Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
First Claim
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1. An optical disk comprising:
- a first information area where data is recorded,a second information area where another data is recorded with marks which have barcode-like configurations in a radius direction,an identifier is provided in the first information area for indicating whether or not said marks with barcode-like configurations are present on said optical disk, said marks and said identifier are in separate locationsa guard band area which is formed between the identifier and the second information area, and whereinat least an address is written on said guard band area.
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Abstract
Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.
52 Citations
4 Claims
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1. An optical disk comprising:
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a first information area where data is recorded, a second information area where another data is recorded with marks which have barcode-like configurations in a radius direction, an identifier is provided in the first information area for indicating whether or not said marks with barcode-like configurations are present on said optical disk, said marks and said identifier are in separate locations a guard band area which is formed between the identifier and the second information area, and wherein at least an address is written on said guard band area. - View Dependent Claims (2)
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3. An optical disk, comprising:
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a barcode-like mark, and an identifier for indicating whether or not said barcode-like mark is present on said optical disk, said barcode-like mark and said identifier are in separate locations.
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4. A method of reproducing an optical disk on which data is recorded, wherein in a prescribed region of said disk, an identifier is provided for indicating whether a barcode-like mark is present or not on said optical disk, said barcode-like mark is disposed in a circumferential direction, and said barcode-like mark having a plurality of bars, said method comprising the steps of
a) focusing a beam on an information layer of said optical disk, b) confirming said optical disk having a control data area and an identifier for indicating the presence or not of said barcode-like mark, wherein said identifier and said barcode-like mark are in separate locations and c) controlling an optical head based on the step of said confirming whether or not to read said barcode-like mark.
Specification